/* === Design Tokens === */
:root {
  --cyan: #19e3ff;
  --purple: #7b61ff;
  --bg: #090b14;
  --text: #f5f7fb;
  --text-muted: #d7deec;
  --text-dim: #aab6cc;
  --glass: rgba(255, 255, 255, 0.095);
  --glass-border: rgba(255, 255, 255, 0.11);
  --cyan-glow: rgba(25, 227, 255, 0.18);
  --purple-glow: rgba(123, 97, 255, 0.18);

  /* Brighter, more readable card surfaces (keeps the dark/neon mood) */
  --card-grad: linear-gradient(180deg, rgba(255, 255, 255, 0.13), rgba(255, 255, 255, 0.055));
  --card-border: rgba(255, 255, 255, 0.16);
  --card-highlight: inset 0 1px 0 rgba(255, 255, 255, 0.14);
  --card-shadow: 0 20px 60px rgba(0, 0, 0, 0.24);

  --radius-card: 26px;
  --radius-pill: 999px;
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --safe-top: env(safe-area-inset-top, 0px);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);

  background:
    radial-gradient(circle at top left, rgba(25, 227, 255, 0.14), transparent 28%),
    radial-gradient(circle at bottom right, rgba(123, 97, 255, 0.14), transparent 28%),
    var(--bg);

  background-attachment: fixed;
  /* iOS safe area bottom padding */
  padding-bottom: var(--safe-bottom);
}

/* Page entry animation */
@keyframes pageIn {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

main {
  animation: pageIn 0.32s ease both;
}

/* Skeleton loading */
@keyframes shimmer {
  0%   { background-position: -400px 0; }
  100% { background-position: 400px 0; }
}

.skeleton-card {
  border-radius: var(--radius-card);
  overflow: hidden;
  background: var(--glass);
  border: 1px solid var(--glass-border);
}

.skeleton-thumb {
  height: 150px;
  background: linear-gradient(90deg,
    rgba(255,255,255,0.06) 25%,
    rgba(255,255,255,0.12) 50%,
    rgba(255,255,255,0.06) 75%
  );
  background-size: 800px 100%;
  animation: shimmer 1.4s infinite;
}

.skeleton-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.skeleton-line {
  height: 14px;
  border-radius: 6px;
  background: linear-gradient(90deg,
    rgba(255,255,255,0.06) 25%,
    rgba(255,255,255,0.12) 50%,
    rgba(255,255,255,0.06) 75%
  );
  background-size: 800px 100%;
  animation: shimmer 1.4s infinite;
}

.skeleton-line.short { width: 40%; }
.skeleton-line.mid   { width: 65%; }

/* Tap highlight reset for mobile */
a, button { -webkit-tap-highlight-color: transparent; }

a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(9, 11, 20, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: var(--safe-top);
}

.header-inner {
  height: 68px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.site-logo {
  font-weight: 900;
  letter-spacing: 0.04em;
}

.site-logo span {
  background: linear-gradient(135deg, #19e3ff, #7b61ff);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.header-nav {
  display: flex;
  gap: 8px;
}

.header-link {
  padding: 10px 14px;
  border-radius: 999px;
  color: var(--text-muted);
  font-size: 14px;
}

.header-link:hover {
  background: rgba(255, 255, 255, 0.08);
}

.header-link-ext {
  color: #19e3ff;
  border: 1px solid rgba(25, 227, 255, 0.28);
}

.header-link-ext:hover {
  background: rgba(25, 227, 255, 0.1);
  border-color: rgba(25, 227, 255, 0.5);
}

/* Hero */

.hero {
  padding: 72px 0 48px;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  margin: 0 0 16px;
  padding: 8px 14px;
  border-radius: 999px;
  color: #19e3ff;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
  background: rgba(25, 227, 255, 0.08);
  border: 1px solid rgba(25, 227, 255, 0.24);
}

.hero h1 {
  margin: 0 0 22px;
  font-size: clamp(42px, 7vw, 72px);
  line-height: 1.08;
  letter-spacing: -0.04em;
}

.hero-text {
  max-width: 620px;
  color: var(--text-muted);
  font-size: 17px;
  line-height: 1.9;
}

.hero-actions {
  display: flex;
  gap: 14px;
  margin-top: 32px;
  flex-wrap: wrap;
}

.primary-btn,
.secondary-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 26px;
  border-radius: 999px;
  font-weight: 800;
  transition: 0.2s ease;
}

.primary-btn {
  color: #06121f;
  background: linear-gradient(135deg, #19e3ff, #7b61ff);
  box-shadow:
    0 14px 34px rgba(25, 227, 255, 0.32),
    0 0 0 1px rgba(255, 255, 255, 0.12) inset;
}

.secondary-btn {
  color: #eaf0fb;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.18);
}

.primary-btn:hover {
  transform: translateY(-2px);
  box-shadow:
    0 18px 44px rgba(25, 227, 255, 0.45),
    0 0 0 1px rgba(255, 255, 255, 0.18) inset;
}

.secondary-btn:hover {
  transform: translateY(-2px);
  border-color: rgba(25, 227, 255, 0.4);
  background: rgba(25, 227, 255, 0.08);
}

/* Hero Card */

.hero-card {
  padding: 28px;
  border-radius: 28px;
  background:
    radial-gradient(circle at top right, rgba(25, 227, 255, 0.12), transparent 60%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.14), rgba(255, 255, 255, 0.05));
  border: 1px solid var(--card-border);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.35), var(--card-highlight);
}

.hero-card-label {
  margin: 0 0 12px;
  color: #19e3ff;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.hero-card-title {
  margin: 0 0 22px;
  font-size: 26px;
  font-weight: 900;
  color: #f5f7fb;
}

.hero-check-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.hero-check-list li {
  position: relative;
  padding: 14px 0 14px 30px;
  color: #e8edf7;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.hero-check-list li:last-child {
  border-bottom: none;
}

.hero-check-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: #19e3ff;
  font-weight: 900;
}

/* Section */

.section {
  padding: 40px 0;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 36px;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin: 0 0 12px;
  color: #19e3ff;
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.1em;
}

.section-label::before {
  content: "";
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, #19e3ff, rgba(25, 227, 255, 0));
}

.section-heading h2 {
  margin: 0 0 14px;
  font-size: 34px;
  letter-spacing: -0.03em;
}

.section-heading p {
  margin: 0;
  color: var(--text-muted);
  font-size: 16px;
  line-height: 1.9;
}

/* Game Filter */

.game-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.filter-btn {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0 16px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.055);
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 800;
  cursor: pointer;
  transition: 0.18s ease;
  font-family: inherit;
}

.filter-btn:hover {
  border-color: rgba(25, 227, 255, 0.4);
  color: #19e3ff;
  background: rgba(25, 227, 255, 0.06);
}

.filter-btn.active {
  background: linear-gradient(135deg, rgba(25, 227, 255, 0.22), rgba(123, 97, 255, 0.22));
  border-color: rgba(25, 227, 255, 0.5);
  color: #ffffff;
}

/* Popular badge on game cards */

.game-popular-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  min-height: 22px;
  padding: 0 9px;
  border-radius: 999px;
  background: linear-gradient(135deg, #19e3ff, #7b61ff);
  color: #07111f;
  font-size: 11px;
  font-weight: 900;
  letter-spacing: 0.04em;
  margin-bottom: 8px;
}

/* Game Cards */

.game-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.game-card {
  min-height: 240px;
  padding: 24px;
  border-radius: 26px;
  background: var(--card-grad);
  border: 1px solid var(--card-border);
  box-shadow: var(--card-shadow), var(--card-highlight);
  transition: 0.22s ease;
}

.game-card:hover {
  transform: translateY(-5px);
  border-color: rgba(25, 227, 255, 0.45);
  box-shadow:
    0 24px 70px rgba(0, 0, 0, 0.34),
    0 0 28px rgba(25, 227, 255, 0.12),
    var(--card-highlight);
}

/* Mobile tap active state */
@media (hover: none) {
  .game-card:active {
    transform: scale(0.97);
    border-color: rgba(25, 227, 255, 0.38);
    transition: 0.1s ease;
  }
}

.game-card-top {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 18px;
}

.game-tag,
.game-level {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 800;
}

.game-tag {
  color: #07111f;
  background: #19e3ff;
}

.game-level {
  color: #dbe3f3;
  background: rgba(255, 255, 255, 0.08);
}

.game-card h3 {
  margin: 0 0 12px;
  font-size: 22px;
}

.game-card p {
  margin: 0 0 22px;
  color: var(--text-muted);
  line-height: 1.75;
}

.game-link {
  color: #19e3ff;
  font-weight: 800;
}

.static-game-links {
  margin-top: 30px;
  padding: 24px;
  border-radius: 26px;
  background:
    linear-gradient(135deg, rgba(25, 227, 255, 0.1), rgba(124, 92, 255, 0.12)),
    rgba(255, 255, 255, 0.035);
  border: 1px solid rgba(255, 255, 255, 0.11);
}

.static-game-links h2 {
  margin: 0 0 16px;
  font-size: 24px;
}

.static-game-links div {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.static-game-links a {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 8px 12px;
  border-radius: 999px;
  color: #dfe8ff;
  text-decoration: none;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 14px;
  font-weight: 800;
}

.static-game-links a:hover {
  color: #07111f;
  background: #19e3ff;
  border-color: rgba(25, 227, 255, 0.65);
}

.game-card {
  overflow: hidden;
  padding: 0;
}

.game-thumb {
  height: 150px;
  background: rgba(255, 255, 255, 0.06);
  overflow: hidden;
}

.game-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: 0.25s ease;
  filter: brightness(0.82) saturate(0.9);
}

.game-card:hover .game-thumb img {
  transform: scale(1.05);
}

.game-card-body {
  padding: 24px;
}

/* Guide */

.beginner-section {
  padding-top: 40px;
}

.guide-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.guide-card {
  padding: 26px;
  border-radius: 26px;
  background: var(--card-grad);
  border: 1px solid var(--card-border);
  box-shadow: var(--card-shadow), var(--card-highlight);
}

.guide-card h3 {
  margin: 0 0 12px;
  font-size: 21px;
  color: #f5f7fb;
}

.guide-card h3::first-letter {
  color: #19e3ff;
}

.guide-card p {
  margin: 0;
  color: var(--text-muted);
  line-height: 1.75;
}

/* Footer */

.site-footer {
  padding: 34px 0 calc(34px + var(--safe-bottom));
  color: var(--text-dim);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

/* =========================================================
   Sippo 親サイトへの導線（ヘッダー内リンク / 全PCサイト共通スタイル）
   ※ URL 差し替え時は HTML 側の href / src を変更
========================================================= */
.sippo-nav {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  flex: 0 0 auto;
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 700;
  white-space: nowrap;
  text-decoration: none;
  color: #ffffff;
  background: linear-gradient(135deg, rgba(25, 227, 255, 0.18), rgba(123, 97, 255, 0.18));
  border: 1px solid rgba(123, 97, 255, 0.5);
  transition: border-color .18s ease, box-shadow .18s ease, transform .18s ease;
}
.sippo-nav:hover,
.sippo-nav:focus-visible {
  border-color: rgba(25, 227, 255, 0.7);
  box-shadow: 0 0 0 1px rgba(25, 227, 255, 0.25), 0 8px 22px rgba(25, 227, 255, 0.16);
  transform: translateY(-1px);
}
.sippo-nav__icon {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.92);
  object-fit: cover;
  flex: 0 0 auto;
}
@media (max-width: 520px) {
  .sippo-nav { padding: 6px; gap: 0; }
  .sippo-nav__icon { width: 20px; height: 20px; }
  .sippo-nav__text { display: none; }
}

/* Mobile */

@media (max-width: 900px) {
  .hero-inner,
  .guide-grid {
    grid-template-columns: 1fr;
  }

  /* 2-column game cards on tablet/large mobile */
  .game-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .hero {
    padding: 48px 0 40px;
  }

  .hero h1 {
    font-size: clamp(36px, 10vw, 54px);
  }

  .hero-actions {
    flex-direction: column;
  }

  .primary-btn,
  .secondary-btn {
    width: 100%;
  }

  .game-card {
    min-height: auto;
  }
}

@media (max-width: 480px) {
  /* Single column on small phones */
  .game-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }
}

@media (max-width: 520px) {
  .container {
    width: min(100% - 20px, 1120px);
  }

  .header-inner {
    height: 56px;
  }

  .site-logo {
    font-size: 14px;
  }

  .header-nav {
    gap: 3px;
  }

  .header-link {
    padding: 8px 8px;
    font-size: 11px;
  }

  .filter-btn {
    min-height: 44px;
    padding: 0 14px;
    font-size: 13px;
  }

  .game-popular-badge {
    font-size: 10px;
  }

  /* Larger tap targets on mobile */
  .primary-btn,
  .secondary-btn {
    min-height: 54px;
    font-size: 16px;
  }

  .game-search input {
    min-height: 50px;
    font-size: 16px; /* prevents iOS zoom on focus */
  }

  .section-heading h2 {
    font-size: 26px;
  }

  .hero-text {
    font-size: 15px;
  }

  .game-card-body {
    padding: 16px;
  }

  .game-card h3 {
    font-size: 18px;
  }

  .game-card p {
    font-size: 14px;
    line-height: 1.7;
    margin-bottom: 14px;
  }

  .hero-text {
    line-height: 1.85;
  }

  .section-heading p {
    font-size: 15px;
    line-height: 1.85;
  }

  .build-comment,
  .info-card p,
  .resolution-card p,
  .seo-guide-panel p {
    font-size: 14.5px;
    line-height: 1.8;
  }

  .game-thumb {
    height: 120px;
  }

  .hero-card,
  .guide-card {
    padding: 20px;
    border-radius: 22px;
  }

  .game-card {
    border-radius: 22px;
  }

  .section {
    padding: 56px 0;
  }

  .section-heading h2 {
    font-size: 28px;
  }
}

/* Game Detail */

.game-detail-hero {
  padding: 44px 0 0;
}

.game-detail-hero > img {
  display: block;
  width: min(1200px, calc(100% - 32px));
  max-height: 675px;
  aspect-ratio: 16 / 9;
  height: min(675px, calc(56.25vw - 18px));
  margin: 0 auto 34px;
  border-radius: 28px;
  object-fit: cover;
  object-position: center;
  filter: brightness(0.72) saturate(1.05);
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow:
    0 24px 70px rgba(0, 0, 0, 0.34),
    0 0 30px rgba(25, 227, 255, 0.08);
}

.back-link {
  display: inline-flex;
  margin-bottom: 24px;
  color: #9aa7bd;
  font-weight: 700;
}

.back-link:hover {
  color: #19e3ff;
}

.game-detail-hero h1 {
  margin: 0 0 20px;
  font-size: clamp(38px, 7vw, 64px);
  line-height: 1.08;
  letter-spacing: -0.04em;
}

.build-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.build-card {
  padding: 26px;
  border-radius: 28px;
  background: var(--card-grad);
  border: 1px solid var(--card-border);
  box-shadow: 0 22px 70px rgba(0, 0, 0, 0.28), var(--card-highlight);
}

.build-label {
  display: inline-flex;
  margin: 0 0 14px;
  padding: 7px 12px;
  border-radius: 999px;
  color: #07111f;
  background: #19e3ff;
  font-size: 12px;
  font-weight: 900;
}

.build-card h3 {
  margin: 0 0 20px;
  font-size: 24px;
}

.build-specs {
  list-style: none;
  padding: 0;
  margin: 0;
}

.build-specs li {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 14px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.build-specs span {
  color: var(--text-dim);
}

.build-specs strong {
  text-align: right;
}

.build-comment {
  margin: 18px 0 0;
  color: var(--text-muted);
  line-height: 1.75;
}

/* "迷ったらこの構成" recommended highlight */

.build-card-recommended {
  border-color: rgba(25, 227, 255, 0.45);
  box-shadow:
    0 22px 70px rgba(0, 0, 0, 0.28),
    0 0 32px rgba(25, 227, 255, 0.1);
}

.build-recommended-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin: 0 0 16px;
  padding: 7px 14px;
  border-radius: 999px;
  background: linear-gradient(135deg, rgba(25, 227, 255, 0.18), rgba(123, 97, 255, 0.18));
  border: 1px solid rgba(25, 227, 255, 0.4);
  color: #19e3ff;
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.04em;
}

.build-recommended-badge::before {
  content: "★";
  font-size: 12px;
}

.seo-guide-section {
  margin-top: 34px;
}

.seo-guide-section .section-heading {
  max-width: 940px;
  margin-bottom: 18px;
}

.seo-guide-panel,
.resolution-card {
  border: 1px solid var(--card-border);
  background:
    radial-gradient(circle at top left, rgba(25, 227, 255, 0.16), transparent 34%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.12), rgba(255, 255, 255, 0.05));
  box-shadow:
    0 18px 40px rgba(0, 0, 0, 0.28),
    inset 0 1px 0 rgba(255, 255, 255, 0.12);
}

.seo-guide-panel {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  padding: 24px;
  border-radius: 26px;
}

.seo-guide-panel h3,
.resolution-card h3 {
  margin: 0 0 10px;
  font-size: 21px;
}

.seo-guide-panel p,
.resolution-card p {
  margin: 0;
  color: var(--text-muted);
  line-height: 1.8;
}

.resolution-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.resolution-card {
  padding: 24px;
  border-radius: 26px;
}

.game-info-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  margin-top: 28px;
}

.info-card {
  padding: 24px;
  border-radius: 26px;
  background: var(--card-grad);
  border: 1px solid var(--card-border);
  box-shadow: var(--card-shadow), var(--card-highlight);
}

.info-card-wide {
  grid-column: span 2;
}

.info-label {
  margin: 0 0 10px;
  color: #19e3ff;
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.1em;
}

.info-card h3 {
  margin: 0 0 12px;
  font-size: 22px;
}

.info-card p {
  margin: 0;
  color: var(--text-muted);
  line-height: 1.8;
}

@media (max-width: 900px) {
  .build-grid,
  .resolution-grid,
  .seo-guide-panel,
  .game-info-grid {
    grid-template-columns: 1fr;
  }

  .info-card-wide {
    grid-column: span 1;
  }

  .game-detail-hero {
    padding: 28px 0 20px;
  }

  .game-detail-hero > img {
    width: calc(100% - 24px);
    height: calc(56.25vw - 13.5px);
    margin-bottom: 22px;
    border-radius: 18px;
  }

  .build-card {
    padding: 20px;
  }

  .game-detail-hero h1 {
    font-size: clamp(28px, 8vw, 48px);
  }
}

@media (max-width: 520px) {
  .game-detail-hero > img {
    width: 100%;
    border-radius: 0;
    margin-bottom: 0;
  }

  .back-link {
    margin-top: 16px;
    font-size: 14px;
  }
}
/* Detail Info Cards */

.game-info-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  margin-top: 28px;
}

.info-card {
  padding: 24px;
  border-radius: 26px;
  background: var(--card-grad);
  border: 1px solid var(--card-border);
  box-shadow: var(--card-shadow), var(--card-highlight);
}

.info-card-wide {
  grid-column: span 2;
}

.info-label {
  margin: 0 0 10px;
  color: #19e3ff;
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.1em;
}

.info-card h3 {
  margin: 0 0 12px;
  font-size: 22px;
}

.info-card p {
  margin: 0;
  color: var(--text-muted);
  line-height: 1.8;
}

.build-comment {
  margin: 18px 0 0;
  color: var(--text-muted);
  line-height: 1.75;
}

@media (max-width: 900px) {
  .game-info-grid {
    grid-template-columns: 1fr;
  }

  .info-card-wide {
    grid-column: span 1;
  }
}
  .game-thumb-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(
    135deg,
    rgba(25,227,255,0.22),
    rgba(123,97,255,0.22)
  );
  color: #ffffff;
  font-size: 22px;
  font-weight: 900;
  letter-spacing: 0.08em;
}

.game-search {
  margin: 0 0 28px;
}

.game-search input {
  width: 100%;
  min-height: 54px;
  padding: 0 18px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  outline: none;
  background: rgba(255, 255, 255, 0.055);
  color: #ffffff;
  font-size: 16px;
  font-weight: 600;
}

.game-search input::placeholder {
  color: #8f9bb0;
}

.game-search input:focus {
  border-color: rgba(25, 227, 255, 0.7);
  box-shadow: 0 0 0 3px rgba(25, 227, 255, 0.12);
}

.empty-message {
  grid-column: 1 / -1;
  padding: 28px;
  border-radius: 24px;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.055);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.related-guide-box {
  margin-top: 12px;
  padding: 24px;
  border-radius: 24px;
  background:
    linear-gradient(
      180deg,
      rgba(255,255,255,0.07),
      rgba(255,255,255,0.03)
    );
  border: 1px solid rgba(255,255,255,0.1);
  text-align: center;
  max-width: 420px;
}

.related-guide-box p {
  margin: 0 0 16px;
  color: var(--text-muted);
}

/* Affiliate Links */

.affiliate-section {
  margin-top: 34px;
  padding: 26px;
  border-radius: 28px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.085), rgba(255, 255, 255, 0.028));
  border: 1px solid rgba(255, 255, 255, 0.11);
  box-shadow: 0 22px 70px rgba(0, 0, 0, 0.24);
}

.affiliate-heading {
  max-width: 760px;
  margin-bottom: 20px;
}

.affiliate-heading h2 {
  margin: 0 0 10px;
  font-size: 28px;
  letter-spacing: -0.03em;
}

.affiliate-heading p {
  margin: 0;
  color: var(--text-muted);
  line-height: 1.8;
}

.affiliate-link-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
}

.affiliate-button {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 92px;
  padding: 16px;
  border-radius: 22px;
  color: #ffffff;
  background:
    linear-gradient(
      135deg,
      rgba(25, 227, 255, 0.13),
      rgba(123, 97, 255, 0.18)
    );
  border: 1px solid rgba(25, 227, 255, 0.18);
  transition: 0.22s ease;
}

.affiliate-button:hover {
  transform: translateY(-3px);
  border-color: rgba(25, 227, 255, 0.42);
  box-shadow:
    0 18px 42px rgba(0, 0, 0, 0.28),
    0 0 22px rgba(25, 227, 255, 0.08);
}

.affiliate-button-disabled {
  cursor: not-allowed;
  color: #d5dcef;
  background:
    linear-gradient(
      135deg,
      rgba(255, 255, 255, 0.075),
      rgba(123, 97, 255, 0.1)
    );
  border-color: rgba(255, 255, 255, 0.12);
  opacity: 0.82;
}

.affiliate-button-disabled:hover {
  transform: none;
  border-color: rgba(255, 255, 255, 0.12);
  box-shadow: none;
}

.affiliate-button span {
  font-size: 15px;
  font-weight: 900;
  line-height: 1.45;
}

.affiliate-button small {
  margin-top: 8px;
  color: var(--text-muted);
  font-size: 12px;
  line-height: 1.55;
}

.affiliate-button em {
  display: inline-flex;
  width: fit-content;
  margin-top: 10px;
  padding: 5px 9px;
  border-radius: 999px;
  color: #19e3ff;
  background: rgba(25, 227, 255, 0.08);
  border: 1px solid rgba(25, 227, 255, 0.2);
  font-size: 11px;
  font-style: normal;
  font-weight: 900;
  letter-spacing: 0.04em;
}

.affiliate-disclosure {
  margin: 18px 0 0;
  color: #8f9bb0;
  font-size: 12px;
  line-height: 1.8;
}

.affiliate-disclosure-hidden {
  display: none;
}

/* Hide affiliate section when all buttons are pending (no active links).
   data-affiliate="loaded" が付いた JS 描画済みセクションは除外する。 */
.affiliate-section:not([data-affiliate="loaded"]):not(:has(.affiliate-button:not(.affiliate-button-disabled))) {
  display: none;
}

/* "他のゲームを見る" bottom nav */
.detail-back-nav {
  margin-top: 24px;
  text-align: center;
}

.detail-back-nav .secondary-btn {
  display: inline-flex;
  padding: 0 28px;
  font-size: 15px;
}

/* Related Sites */

.related-sites-section {
  padding-top: 16px;
  padding-bottom: 80px;
}

.related-site-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  max-width: 960px;
  margin: 0 auto;
}

.related-site-button {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 132px;
  padding: 24px 28px;
  border-radius: 100px;
  color: #ffffff;
  background:
    linear-gradient(
      135deg,
      rgba(25, 227, 255, 0.18),
      rgba(123, 97, 255, 0.22)
    );
  border: 1px solid rgba(25, 227, 255, 0.22);
  box-shadow: 0 18px 44px rgba(0, 0, 0, 0.26);
  transition: 0.22s ease;
}

.related-site-button:hover {
  transform: translateY(-4px);
  border-color: rgba(25, 227, 255, 0.48);
  box-shadow:
    0 24px 56px rgba(0, 0, 0, 0.34),
    0 0 26px rgba(25, 227, 255, 0.1);
}

.related-site-mini {
  margin-bottom: 10px;
  color: #19e3ff;
  font-size: 14px;
  font-weight: 900;
  letter-spacing: 0.08em;
}

.related-site-button span:not(.related-site-mini) {
  margin-bottom: 8px;
  font-size: 20px;
  font-weight: 900;
}

.related-site-button small {
  color: #d5dcef;
  font-size: 14px;
  line-height: 1.55;
}

.detail-related-sites {
  margin-top: 32px;
}

.detail-related-sites .related-site-grid {
  grid-template-columns: repeat(2, 1fr);
  max-width: none;
}

.detail-related-sites .related-site-button {
  border-radius: 26px;
}

.related-site-build {
  background:
    linear-gradient(
      135deg,
      rgba(25, 227, 255, 0.2),
      rgba(123, 97, 255, 0.24)
    );
  border-color: rgba(25, 227, 255, 0.3);
}

.related-site-gpu {
  background:
    linear-gradient(
      135deg,
      rgba(47, 128, 255, 0.2),
      rgba(123, 97, 255, 0.24)
    );
  border-color: rgba(77, 156, 255, 0.3);
}

@media (max-width: 900px) {
  .affiliate-link-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .related-site-grid {
    grid-template-columns: 1fr;
    gap: 16px;
    max-width: 520px;
  }

  .related-site-button {
    min-height: auto;
    padding: 20px 22px;
    border-radius: 28px;
  }
}

@media (max-width: 520px) {
  .affiliate-section {
    margin-top: 26px;
    padding: 20px;
    border-radius: 22px;
  }

  .affiliate-heading h2 {
    font-size: 24px;
  }

  .affiliate-link-grid {
    grid-template-columns: 1fr;
  }

  .affiliate-button {
    min-height: auto;
    padding: 15px 16px;
  }
}

/* === Hint / Tip boxes (beginner-friendly) === */

.hint-box {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  margin: 22px 0 0;
  padding: 18px 20px;
  border-radius: 20px;
  background:
    linear-gradient(180deg, rgba(25, 227, 255, 0.12), rgba(25, 227, 255, 0.045));
  border: 1px solid rgba(25, 227, 255, 0.28);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.hint-box::before {
  content: "💡";
  flex: 0 0 auto;
  font-size: 22px;
  line-height: 1.4;
}

.hint-box-body {
  min-width: 0;
}

.hint-box-title {
  margin: 0 0 4px;
  color: #19e3ff;
  font-size: 14px;
  font-weight: 900;
  letter-spacing: 0.02em;
}

.hint-box p {
  margin: 0;
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.85;
}

/* Warning variant (purple) for cautions */
.hint-box.is-caution {
  background:
    linear-gradient(180deg, rgba(123, 97, 255, 0.16), rgba(123, 97, 255, 0.05));
  border-color: rgba(123, 97, 255, 0.36);
}

.hint-box.is-caution::before {
  content: "⚠️";
}

.hint-box.is-caution .hint-box-title {
  color: #b3a3ff;
}

/* Turn each game page's "初心者向けの注意点" note into a friendly hint box
   (CSS-only, applies to every games/*.html without markup changes). */
.seo-guide-section[aria-labelledby="beginnerCautionTitle"] .section-heading > p {
  position: relative;
  margin-top: 16px;
  padding: 18px 20px 18px 54px;
  border-radius: 20px;
  background: linear-gradient(180deg, rgba(25, 227, 255, 0.12), rgba(25, 227, 255, 0.045));
  border: 1px solid rgba(25, 227, 255, 0.28);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1);
  color: var(--text-muted);
}

.seo-guide-section[aria-labelledby="beginnerCautionTitle"] .section-heading > p::before {
  content: "💡";
  position: absolute;
  left: 18px;
  top: 15px;
  font-size: 20px;
}

/* === Sippo-style guide character === */

.guide-mascot {
  display: flex;
  gap: 20px;
  align-items: center;
  margin-top: 32px;
  padding: 24px 26px;
  border-radius: 26px;
  background:
    radial-gradient(circle at left center, rgba(25, 227, 255, 0.14), transparent 55%),
    linear-gradient(135deg, rgba(123, 97, 255, 0.14), rgba(255, 255, 255, 0.05));
  border: 1px solid var(--card-border);
  box-shadow: var(--card-shadow), var(--card-highlight);
}

.guide-mascot-avatar {
  flex: 0 0 auto;
  width: 92px;
  height: 92px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 28%, #122036, #0a0e1a);
  border: 1px solid rgba(25, 227, 255, 0.45);
  box-shadow:
    0 0 0 4px rgba(25, 227, 255, 0.08),
    0 0 26px rgba(25, 227, 255, 0.22);
  animation: mascotFloat 4.5s ease-in-out infinite;
}

@keyframes mascotFloat {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-5px); }
}

.guide-mascot-avatar svg {
  width: 62px;
  height: 62px;
  display: block;
}

/* Speech bubble next to the mascot */
.guide-mascot-bubble {
  position: relative;
  flex: 1 1 auto;
  min-width: 0;
  padding: 18px 20px;
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.13), rgba(255, 255, 255, 0.06));
  border: 1px solid var(--card-border);
}

.guide-mascot-bubble::before {
  content: "";
  position: absolute;
  left: -9px;
  top: 32px;
  width: 16px;
  height: 16px;
  background: rgba(255, 255, 255, 0.12);
  border-left: 1px solid var(--card-border);
  border-bottom: 1px solid var(--card-border);
  transform: rotate(45deg);
}

.guide-mascot-name {
  margin: 0 0 6px;
  color: #19e3ff;
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.04em;
}

.guide-mascot-bubble p {
  margin: 0;
  color: var(--text);
  font-size: 15px;
  line-height: 1.85;
}

.guide-mascot-bubble p + p {
  margin-top: 8px;
}

@media (max-width: 560px) {
  .guide-mascot {
    flex-direction: column;
    align-items: stretch;
    text-align: left;
    padding: 20px;
    gap: 16px;
  }

  .guide-mascot-avatar {
    margin: 0 auto;
  }

  .guide-mascot-bubble::before {
    left: 50%;
    top: -9px;
    margin-left: -8px;
    border-left: 1px solid var(--card-border);
    border-bottom: none;
    border-top: 1px solid var(--card-border);
    border-right: 1px solid var(--card-border);
  }

  .hint-box {
    padding: 16px;
  }
}